Scientific Calculator

Online scientific calculator with trigonometric, logarithmic, and exponential functions. This tool processes all data locally in your browser. No information is ever sent to any server. Completely free, no registration required.

How to Use the Scientific Calculator

1. Enter your input values above
2. Results update automatically
3. Copy or download the output

What is a Scientific Calculator?

A Scientific Calculator brings all the functions of a physical scientific calculator (like the TI-36X or Casio fx-991) to your browser — trigonometry, logarithms, exponents, roots, fractions, factorials, memory functions, and statistical calculations. It's free, always available, and doesn't require batteries or a trip to the store. Whether you're a student solving math problems, an engineer doing field calculations, or anyone needing beyond-basic-arithmetic math functions, this calculator handles it.

How Does It Work?

Use the on-screen keypad or type directly. The calculator supports standard scientific functions: sin/cos/tan (degrees, radians, or gradians), log (base 10), ln (natural log), exponentiation (x^y), square root, nth root, factorial, reciprocal, π and e constants, and parentheses for grouping. Memory functions (M+, M−, MR, MC) let you store and recall values. The history tape shows recent calculations. Toggle between DEG/RAD/GRAD modes. Results display to 10 significant digits.

Formula

Trig (degrees mode): sin(x°), cos(x°), tan(x°)\nTrig (radians mode): sin(x rad), cos(x rad), tan(x rad)\n\nLogarithms:\nlog(x) = log₁₀(x) — log base 10\nln(x) = logₑ(x) — natural log\nlogₐ(b) = ln(b) ÷ ln(a) — change of base\n\nExponents: x^y = x raised to power y\nRoots: ⁿ√x = x^(1/n)\n\nFactorial: n! = n × (n−1) × ... × 2 × 1\nPermutations: P(n,r) = n! ÷ (n−r)!\nCombinations: C(n,r) = n! ÷ (r!(n−r)!)

Who Uses This Tool?

• Students solving trigonometry, algebra, and calculus problems
• Engineers performing field calculations without a physical calculator
• Scientists computing exponentials, logs, and statistical values
• Finance professionals calculating compound growth and NPV
• Anyone who needs a scientific calculator and doesn't have one handy

Pro Tips

• Double-check DEG vs. RAD mode before trig calculations — sin(90) = 1 in degrees, but ~0.894 in radians. Wrong mode is the #1 calculator mistake
• Use the memory functions (M+, M−) for multi-step calculations. Store intermediate results rather than writing them down
• The change-of-base formula converts any logarithm to natural log: log_a(b) = ln(b)/ln(a). Use this with the ln button
• For very large or small numbers, use scientific notation (E). 3e8 = 300,000,000. 1.6e-19 = 0.00000000000000000016

Frequently Asked Questions about Scientific Calculator

How is this different from a basic calculator?

A basic calculator does +, −, ×, ÷, and sometimes %. A scientific calculator adds trigonometry, logarithms, exponentiation, roots, factorials, permutations/combinations, and memory functions. It's the level you need for high school math and beyond.

Why do I need DEG/RAD/GRAD modes?

Angles can be measured in degrees (360° in a circle), radians (2π in a circle), or gradians (400 grad in a circle). Degrees are used in everyday trigonometry; radians are used in calculus and physics. GRAD mode is rarely used outside of surveying.

Free online Scientific Calculator — no signup, 100% client-side processing. All data stays in your browser.